The Grey 5" Thick Soft/Firm Reversible Gel Memory Foam Orthopedic Dog Bed offers superior quality memory foam with waterproof removable liner. This bed is great for older dogs and dogs that have joint problems. It features 2 layers of foam, , the bottom which is made with a 3” High Support base and top layer 2” gel memory foam. It is made with a 100% waterproof removable cover, and has a durable 100% cotton canvas. It is machine washable so it can be cleaned multiple times.